DE239980C - - Google Patents

Info

Publication number
DE239980C
DE239980C DENDAT239980D DE239980DA DE239980C DE 239980 C DE239980 C DE 239980C DE NDAT239980 D DENDAT239980 D DE NDAT239980D DE 239980D A DE239980D A DE 239980DA DE 239980 C DE239980 C DE 239980C
Authority
DE
Germany
Prior art keywords
ink
lenses
lens
holder
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
DENDAT239980D
Other languages
German (de)
English (en)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of DE239980C publication Critical patent/DE239980C/de
Active legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B29/00Maps; Plans; Charts; Diagrams, e.g. route diagram
    • G09B29/10Map spot or coordinate position indicators; Map reading aids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K5/00Pens with ink reservoirs in holders, e.g. fountain-pens
    • B43K5/02Ink reservoirs
    • B43K5/12Ink reservoirs with ink-level inspection means

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Business, Economics & Management (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Pens And Brushes (AREA)
DENDAT239980D 1910-01-24 Active DE239980C (OSRAM)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US191100218XA 1910-01-24 1910-01-24

Publications (1)

Publication Number Publication Date
DE239980C true DE239980C (OSRAM)

Family

ID=32394076

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT239980D Active DE239980C (OSRAM) 1910-01-24

Country Status (2)

Country Link
DE (1) DE239980C (OSRAM)
GB (1) GB191100218A (OSRAM)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381818A1 (en) * 1989-01-09 1990-08-16 Eduardo Sanchez Muliterno Ink level inspection means for writing devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381818A1 (en) * 1989-01-09 1990-08-16 Eduardo Sanchez Muliterno Ink level inspection means for writing devices

Also Published As

Publication number Publication date
GB191100218A (en) 1911-02-23

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